You know, I didn't see that there was a problem with sex on the playa. People were very discreet so there was no public exhibition... hey, it's not like Ibiza. Anyway, no there should not be any "law" per se as much as a friendly reminder that public acts outside of heavy petting (no genital stimulation in public) can lead to arrest by local law enforcement so beware. Otherwise, if you're going stagg at this year's freak fest then remember... masturbation is an art! Try to perfect your art of masturbation then try out your new skills on your s.o. upon your return to the "real world." Here's to "getting lucky" with your own damn self!!!